The IGB Surface Back Boxes are the ideal solution for surface mounting the 2 to 6 Gang Infinity devices. The IGB boxes are designed with attention to installation needs. Each box is designed with a solid surface area with pre-drilled and tapped hole configurations to mount the majority of industry appliances/devices. Durable 18 gauge steel finish in red or white professional grade baked on enamel finish. Each box comes with standard 1/2" & 3/4" EMT knockouts strategically located on the box.